<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .suibian{
            color:brown;
        }
        /* 类选择器起名不能起名标签名，不要用纯数字，最好只用英文 */
    </style>
</head>
<body>
    <ul>
        <li class="suibian">冰雨</li>
        <li>冰雨</li>
        <li>冰雨</li>
        <li>冰雨</li>
        <li>冰雨</li>
        <li class="suibian">我想变红色</li>
    </ul>
    
</body>
</html>